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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 613 · 40 questions
TalentJR

How to do it in your head ((a + b)²): Split: 27 = 20 + 7. Find 20² = 400, 2 × 20 × 7 = 280 and 7² = 49. Add, biggest first: 400 + 280 + 49.

NameDateTime takenScore ___ / 40
  1. 1.23² =
  2. 2.17² =
  3. 3.15² =
  4. 4.25² =
  5. 5.18² =
  6. 6.28² =
  7. 7.21² =
  8. 8.22² =
  9. 9.24² =
  10. 10.12² =
  11. 11.16² =
  12. 12.19² =
  13. 13.13² =
  14. 14.26² =
  15. 15.11² =
  16. 16.27² =
  17. 17.29² =
  18. 18.15² =
  19. 19.14² =
  20. 20.14² =
  21. 21.15² =
  22. 22.17² =
  23. 23.12² =
  24. 24.17² =
  25. 25.15² =
  26. 26.22² =
  27. 27.24² =
  28. 28.12² =
  29. 29.17² =
  30. 30.28² =
  31. 31.14² =
  32. 32.26² =
  33. 33.25² =
  34. 34.28² =
  35. 35.15² =
  36. 36.16² =
  37. 37.14² =
  38. 38.15² =
  39. 39.16² =
  40. 40.25² =

Answer key

  1. 529
  2. 289
  3. 225
  4. 625
  5. 324
  6. 784
  7. 441
  8. 484
  9. 576
  10. 144
  11. 256
  12. 361
  13. 169
  14. 676
  15. 121
  16. 729
  17. 841
  18. 225
  19. 196
  20. 196
  21. 225
  22. 289
  23. 144
  24. 289
  25. 225
  26. 484
  27. 576
  28. 144
  29. 289
  30. 784
  31. 196
  32. 676
  33. 625
  34. 784
  35. 225
  36. 256
  37. 196
  38. 225
  39. 256
  40. 625

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